Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Tue, 8 Nov 2016 13:08:38 +0000

Actually I think you need to call start() in the code that created the object, not in the constructor.  The problem is that the derived class needs to be completely constructed before start() is called.

This is the example from NDPluginStdArrays:

/* Configuration routine.  Called directly, or from the iocsh function */
extern "C" int NDStdArraysConfigure(const char *portName, int queueSize, int blockingCallbacks, 
                                    const char *NDArrayPort, int NDArrayAddr, size_t maxMemory,
                                    int priority, int stackSize)
{
    NDPluginStdArrays *pPlugin = new NDPluginStdArrays(portName, queueSize, blockingCallbacks, NDArrayPort, NDArrayAddr, maxMemory,
                                                       priority, stackSize);
    return pPlugin->start();
}

________________________________________
From: [email protected] [[email protected]] on behalf of Siniša Veseli [[email protected]]
Sent: Tuesday, November 08, 2016 7:03 AM
To: [email protected]
Subject: Re: processCallbacks() never called in areaDetector plugin

Hi,

If you are using ADCore 2-5, you probably need to call start() in your
plugin's constructor.

Sinisa

On 11/8/16 6:28 AM, Jonas Nilsson wrote:
> Hi,
> I am trying to learn how to write an areaDetector plugin. As a
> starting point I have tried to use the ”NDStdArrays” plugin and simply
> switched all the names in the relevant source files to something else
> so as to not cause a conflict with the existing NDStdArrays plugin.
> The problem is that whereas the original NDStdArrays plugin appears to
> work correctly (ArrayCounter_RBV increases), my version does not
> appear to do so.
>
> I have put some simple debug messages into all the functions and
> member functions in the source file and while the plugin appears to
> initialize correctly, processCallbacks(NDArray *pArray) is never called.
>
> The plugin is enabled (EnableCallbacks_RBV returns ”Enable”) and I can
> see no error or warning messages when starting iocsh. Does anyone have
> a good idea on what might be a common beginners problem or how to
> debug the problem?
>
> Regards,
> Jonas

--
Siniša Veseli
Scientific Software Engineering & Data Management
Advanced Photon Source
Argonne National Laboratory
[email protected]
(630)252-9182

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System